Hackers swipe data of 4.5M at UCLA Health System in massive cyberattack

The four-hospital UCLA Health System on Friday notified a staggering 4.5 million of its patients that their protected health information and Social Security numbers were compromised following one of the largest HIPAA breaches ever reported.

Despite the cyberattack having occurred nearly a year ago, in September 2014, officials did not notify patients until July 17. UCLA first detected suspicious activity on its networks back in October 2014, according to a company statement.